EP2409784A2 - Roller separator for a device for screening decomposable material - Google Patents

Abstract

The screening apparatus comprises individual screen roller (8) provided in a screening unit as a hollow shaft designed in different cross-sections. Elastic elements or fingers are arranged in a radially projecting manner around the circumference of the hollow shaft. The elastic elements or fingers move together with the spaced screen roller in a parallel manner. Independent claims are also included for the following: (1) a screen roller for a screening unit; and (2) a shredder for screening of decomposable material, particularly compost or recycled material for composting.

Description

The invention relates to a screen roller for a device for screening rotting material, in particular compost or composted material, with at least one screen unit having at least one screen shaft / screen, with which the screenings is separable into at least two fractions. The sieving apparatus is preferably used in screening machines / separators or shredders.

From the prior art, a variety of devices and methods for separating a variety of mixed materials in the form of star screens are known as Siebaggregate. A disadvantage is particularly in the screening of rotting material with a high proportion of green matter, leaves or the like screen material, which also still have a high proportion of moisture, that the screen elements quickly enforce and thus often need to be cleaned. So is out of the DE 103 52 796 A1 one Siebaggregat with rotating screen stars, which are arranged on a plurality of aligned screen shafts, known, in which as possible the adhesion of material in the interstices to be reduced by webs are arranged between successive arms on a hub. From the DE 44 15 815 A1 Furthermore, a screening device for screening of relatively moist caking tends compost known, with several parallel driven star waves on which rotatably and axially juxtaposed sieve stars with restricted elastic fingers and rotatably between the screen stars with the waves conically arranged pulleys for loosening, mixing and crushing are provided of the screenings. Star screens equipped with cleaning devices are made of DE 100 60 721 A1 , of the DE 10 2005 044 552 A1 and the DE 20 2004 007 984 U1 known.

Based on this prior art, the invention has for its object to provide a device for screening or device elements selbiger, in which or with which, especially when sifting verrottungsfähigem material, in which it quickly in spaces of the screen unit for sticking or adhering material and thereby clogging of the screen elements or lumping of the material may occur, such clogging of the screen elements is avoided or at least reduced; In addition, a quick and easy cleaning, combined with easy care and maintenance are possible; Furthermore, it should be easy to assemble and disassemble due to their simple design manufacturing technology, especially when used in a shredder for the preparation of said material.

To solve this problem, the invention proposes a screen roller for a screening unit of a device for screening of rotting material with the features of claim 1. The subordinate claims 2 to 15 disclose developments, embodiments and uses of the invention.

The new screen roller for a screening unit of a device for screening rotting material, in particular compost or composting processed material, according to the invention has elastic, resilient fingers which are arranged star-shaped and detachable, and which, preferably by means of a frictional connection, on or in the peripheral surfaces the shaft of the screen roller can be fastened.

The fingers are in particular designed as resilient elements. The fingers are preferably narrower at their free ends.

According to a further advantageous embodiment, the fingers are angled counter to the direction of the screen roller, preferably two or more times, or polygonzugartig formed. They are preferably made of steel.

The elastic fingers fixed on or in the circumferential surface of the screen roller are arranged individually or grouped, as finger strips, at a distance detachable from one another. The finger strips are preferably divided into finger strip segments.

As a result of the non-positively releasable arrangement and / or the further mentioned embodiments of the elastic fingers, these can likewise be exchanged for cleaning or replacement individually or in groups, which is also another for a user of a mobile device for screening or a mobile shredder with integrated device for screening Saving time and a simplified and rapid replacement of affected parts allows.

According to one embodiment variant, the individual screen rollers of a new screen unit, that is to say their basic body, are provided as hollow shafts of different design and divided in cross-section. A preferred embodiment is also seen in that, contrary to the prior art, the hollow shaft is preferably formed octagonal and divided and whose lateral surface consists of several releasably interconnected segments, so that the hollow shaft for cleaning and maintenance work no longer has to be removed as a whole but only the corresponding segments are replaced or cleaned. This means a further enormous saving in working hours and for one user of one Shredder with screening device or a screening machine / Separators a simplified and rapid replacement of the affected parts. The new screen roll according to the invention is arranged at least twice as rotating screen rollers in a device for screening rotting material, especially compost or composted material, to form at least one screen plane in the at least one screen unit of the device, including the screen rollers with respect to their axes of rotation are arranged at a distance from each other lying parallel to each other and by the circumference of each star-shaped abragend arranged elastic elements / fingers meshing move past each other.

At least two screening units are advantageously provided in a device for screening, wherein a second screening unit, at least partially, is arranged below a first screening unit at a distance and with mutually essentially parallel directed sieve planes.

Preferably, at least one of the sieve units consists of sections. The sections of such a sieve unit are preferably arranged successively in the conveying direction.

According to a further embodiment, the sections of a first screening unit and the sections of the other, second screening unit are each arranged vertically offset from one another in the conveying direction, wherein the sections of one screen unit are provided substantially at a parallel distance from the sections of the other screen unit.

According to another embodiment, the individual sections of the first and second screen unit depending on the application and different materials provided for processing, seen in the conveying direction, different lengths.

According to a further embodiment, the axial distance of adjacent, arranged in a sieve level screen rollers is variably adjustable.

According to another embodiment, it is provided that the vertical distance between the respective screen plane and the respective associated part plane is substantially parallel or that the part plane has a greater pitch than the screen plane. This design has an influence on the screening result and can be optimally adjusted to the material to be screened by means of a variable adjustment option.

Fig. 1

eine mobile Vorrichtung zum Sieben in neuer Ausführung in einer Gesamt-Seitenansicht;

Fig. 1a

zeigt Details in Fig. 1,

Fig. 2

eine neuartige Siebwalze für eine Vorrichtung zum Sieben im Schnitt A-A;

Fig. 3

die neuartige Siebwalze nach Fig. 2 in Seitenansicht;

Fig. 3a

Details zu der neuen Siebwalze nach Fig. 3

und Fig. 4a, 4b

weitere Details der neuen Siebwalze.

The invention will be explained in more detail with reference to an embodiment schematically illustrated in drawings. Show it:

Fig. 1

a mobile device for screening in a new version in an overall side view;

Fig. 1a

shows details in Fig. 1 .

Fig. 2

a novel screen roll for a sieving in section AA;

Fig. 3

the novel screen roller after Fig. 2 in side view;

Fig. 3a

Details on the new screen roller after Fig. 3

and FIGS. 4a, 4b

further details of the new screen roller.

In FIG. 1 a new mobile device 1 is shown in side view in a schematic view, wherein the housing or panel is partially cut or removed, so that a clear view into the interior is possible. In this device 1 for screening novel screen rollers 8 are used, which will be described in more detail below. According to one embodiment variant of the invention, these novel screen rollers 8 are arranged in screening units 2 and 3 for forming one screen plane 21, 22 each. Preferably, two screening units 2, 3 are provided, however, depending on the requirements and design of the screening apparatus 1, more than two screening units may also be used. The new sifting device 1 is also designed so that it can be used as an integral part of a shredder for processing rotting material for composting or for processing partly rotted compost.

The individual screening units 2 and 3 of the sieving apparatus 1 are arranged substantially parallel to each other at a distance from each other, wherein in this embodiment, the screening units 2 and 3 in each case in the conveying direction R successively - here two - sections 4, 5 and 6, 7, the are substantially vertically offset from each other and can be designed differently long. The individual screening units 2 and 3 have several screen rolls 8 arranged parallel to one another.

Details of this arrangement are in the FIG. 1a shown. The first section 4 of the first screening unit 2 has a first screening plane 21. In the conveying direction F, this first section 4 follows the second section 5 of this first screening unit 2. This second section 5, ie its part plane 21a, is vertically offset downwards to the first screening plane 21 arranged. The elements of the second screen unit 3 are also constructed in this way, the first section 6 of the second screen unit 3 forms a second screen plane 22. The second section 7 of this second screen unit 3 forms a part plane 22a, which also lies vertically offset below the screen plane 22. Both partial planes 21a and 22a lie with parallel vertical offset to the respective main plane, the first screen plane 21 and the second screen plane 22, respectively.

The screen rollers 8 are corresponding FIG. 2 and FIG. 3 according to the invention as octagonal and divided hollow shafts 9 formed, which are mounted at their ends 10, 11 in the screening units 2 and 3 respectively. On the octagonal hollow shaft 9 12 elastic fingers 13 are releasably secured to the individual surfaces, in the present embodiment by a screw 14 - see FIG. 3 -, In which different releasable non-positive connections can be used. By this detachable connection damaged fingers 13 can be replaced quickly without replacing the entire screen roller 8.

The fingers 13 are arranged on the surfaces 12 of the octagonal hollow shaft 9 with a distance 15 to each other, so that the fingers 13 of the mutually parallel screen rollers 8 pass each other.

The fingers 13 are formed as resilient elements which are narrower at their free ends 16. To increase the spring properties, the fingers 13 are corresponding FIG. 3 formed angled against the direction R. Due to the increased elasticity of the fingers 13, the screening process is substantially improved.

The free ends of the fingers 13 generate upon rotation of the screen roller 8 in the direction of rotation R a circle 8a, which varies when loaded fingers 13 by discontinued material selectively in the radius and thus the advantages of a roller or star screen advantages of a flat screen are superimposed.

In the execution after FIG. 3 the fingers are angled against the direction of rotation R once and in a further embodiment after FIG. 3a angled several times. In the FIG. 3a is a fourfold Angulation of the fingers 13 are shown so that finger portion 13a, 13b, 13c, 13d and 13e are formed. The number of bends depends on the type of material to be screened and / or the material of the fingers.

Another advantage of the present invention is that the octagonal hollow shaft 9 is formed divided and consists of a plurality of coupled segments 17, see Fig. 2 , The segments 17 are detachably connected to each other, in the present embodiment by screw 18, so that when damaged or for cleaning both individual segments 17 or more segments 17 of the hollow shaft 9 can be replaced, as well as individual or groups of fingers 13 of a segment 17, without replacing the entire screen roller 8.

Further details regarding the fingers 13 are in the FIGS. 4a and 4b shown. According to the presently discussed embodiment, the respectively arranged on one of the surfaces 12 of the octagonal hollow shaft 9 releasably arranged fingers 13 could be arranged in groups. As shown FIG. 4a as a continuous finger bar 20, which has a plurality of apertures 19 for passing screws 14 and for attachment to the shafts of the screws 14.

In the FIG. 4b a further embodiment of the finger bar 20 is shown. There, the entire finger bar 20 is off individual segments 20a, 20b and 20c formed. The size, that is, the length of these finger strip segments 20a, 20b and 20c will depend on the particular design of the insert of the device in question for the sifting of rotting material. For larger machines, ie those with a large wire width, a multiple subdivision is made, while in screens with a smaller wire width, the number of segments of a finger bar 20 will be smaller. On the other hand, the subdivision of the finger strip 20 into segments has the advantage that fingers 13 of individual segments 20a, 20b ... 20n can be designed to be of different widths and lengths so that a further influence on the sieving properties of a sieving device can be taken , Depending on which material is to be seven, by rapid retooling of the sieve units, so replacement of finger segments, the machine in question (a device for screening, a shredder with sieve) can be set up with low production overheads and more optimally to the task at hand; In addition, the pure operating costs / consumption costs (eg fuel for the drive) can be influenced more variably. This is particularly beneficial for service providers in the sector concerned.

The described embodiments of the invention and drawing features shown are examples and not Restrictions. Other modifications and embodiments falling within the scope and spirit of the principles of the invention are also within the scope of the invention.

Thus, for example, in an embodiment not shown, the position of the respective part plane 21a or 22a to its main plane, the first screen plane 21 and the second screen plane 22 may not be parallel. Depending on the nature of the material to be processed, so it is more so-called heavy or light material, or is the proportion of coarse-grained material larger, or the proportion of fine-grained material is greater, can be adjusted by adjusting the inclination of the sieve planes 21, 21a or 22, 22a, the effectiveness of the screening can be influenced, ie, according to one embodiment, the rise of the first screening plane 21 can be greater than the increase of the subplane 21a or vice versa, so that, for example, heavy material rolls at the beginning of screening along the screening plane, ie Movement is and therefore less prone to caking.

Further modifications of the invention relate to the design of the fingers 13 of the screen roller 8.

If the material to be screened contains or contains predominantly heavy material, such as green matter or heavily rotted compost or material with a high moisture content, the fingers themselves must be very stable. In order for the desired elasticity to be given, such fingers will more likely be made with multiple bends. If the material to be screened primarily contains or contains, for example, dry wood, branches, bushes, etc., the fingers 13 do not need to be so strongly dimensioned, and consequently one or two angulation of the fingers is necessary for the production of the required elasticity. On the other hand, if the material used to make the fingers is inherently very elastic, few bends will suffice, but if the material used to make the fingers is inherently very stiff or brittle, a large number of bends will be provided. Through these embodiments of the invention, the manufacturer of such screen rollers can react very variable on material prices in the market, so that its production costs can be made very variable.

LIST OF REFERENCE NUMBERS

1

mobile device

2

first sieve unit

3

second screening unit

4

first section of the first screening unit 2

5

second section of the first screening unit 2

6

first section of the second screening unit 3

7

second section of the second screening unit 3

8th

wire rolls

8a

circle

9

octagonal hollow shaft

10

shaft end

11

shaft end

12

Surfaces of the octagonal hollow shaft

13

finger

13a, 13b, 13c, 13d, 13e

finger portions

14

screw

15

Distance between the fingers

16

free ends of the fingers

17

Segments of the octagonal hollow shaft

18

screw

19

outbreaks

20

finger ridges

20a, 20b, 20c

segments

21

first sieve level

21a

sublevel

22

second sieve level

22a

sublevel

F

conveying direction

R

direction of rotation

Claims (15)

Screening roller for a screen unit (2; 3) containing at least one rotating screen roller (8) for sifting decomposable material, in particular compost or material prepared for composting, the elements projecting radially at its lateral surface (12) has,
characterized in that
the star-shaped elements / fingers (13) are elastically yielding and on or in the lateral surface (12) of the screen roller (8) releasably, preferably by means of a frictional connection (14), are attached. Screening roller according to claim 1,
characterized in that
the fingers (13) are designed as resilient elements which become narrower at their free ends (16). Screening roller according to claim 1 or 2,
characterized in that
the fingers (13) are formed angled against the running direction (R) of the screen roller (8), preferably twice or more times. Screening roller according to claim 1, 2 or 3,
characterized in that
the elastic fingers (13) are in particular made of steel. Screening roller according to claim 1, 2, 3 or 4,
characterized in that
the fingers (13) are arranged integrally in a finger strip (20). Screening roller according to claim 5,
characterized in that
the finger strip (20) is divided into separable finger strip segments (20a, 20b, 20c). Screening roller according to one of claims 1 to 6,
characterized in that
the body of the screen roller (8) is provided as a cross-section differently shaped and divided hollow shaft (9). Screening roller according to claim 7,
characterized in that
the hollow shaft (9) is formed polygonal, preferably octagonal, and divided and consists of several detachably interconnected segments (17). Screening roller according to one of claims 1 to 8,
marked by
their arrangement at least twice as rotating screen rollers (8) in a device (1) for sifting decomposable material, in particular compost or composted material, to form a screen plane (21; 22) in the at least one screening unit (2; 3) Device (1), for which the screen rollers (8) are arranged lying parallel to each other with respect to their axes of rotation at a distance and by the (8) periphery (12) each star-shaped abragend arranged elastic elements / fingers (13) move past each other in a meshing manner. Apparatus (1) for screening rotting material, the screening unit (2, 3) of which has a screen plane (21, 22) formed according to claim 9,
characterized in that
this screening unit is provided twice (2, 3) or more than once, wherein the screening units (2, 3) are arranged at a distance from one another at least partially with one another with sieve planes (21, 22) directed essentially parallel to one another. Device (1) according to claim 9 or 10,
characterized in that
at least one of the sieve units (2; 3) consists of sections (4, 5 and 6, 7) arranged successively in the conveying direction in the sieve plane (21; 22). Device (1) according to claim 11,
characterized in that
the sections (4, 5) of a first screening unit (2) and the sections (6, 7) of the other second screening unit (3) are each arranged offset vertically relative to one another in the conveying direction (F), the sections (4, 5) of a sieve unit (2) are provided substantially at a parallel distance from the sections (6, 7) of the other sieve unit (3). Device (1) according to claim 12,
characterized in that
that of section (5 or 7) of each screening unit (2 or 3) following in the conveying direction (F) on the respective first section (4 or 6) in a direction substantially parallel to the respective screening plane (21 or 22) vertical distance lying part plane (21 a and 22 a) is arranged. Device (1) according to claim 13,
characterized in that
the vertical distance between the screen plane (21 or 22) and the associated part plane (21a or 22a) is substantially parallel or the part plane (21a, 22a) has a greater pitch. Device (1) according to one of claims 11 to 14,
characterized in that
the individual sections (4, 5, 6, 7) of the screening units (2, 3) have different lengths.

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